In-cell touch display structure

ABSTRACT

An in-cell touch display structure includes: an upper substrate, a lower substrate, a liquid crystal layer configured between the upper and lower substrates; a black matrix layer, and a thin film transistor and sensing electrode layer. The thin film transistor and sensing electrode layer includes a gate line sub-layer having a plurality of gate lines and a plurality of connection segments separated by the gate lines, and a source line sub-layer having a plurality of source lines and a plurality of sensing conductor segments separated by the source lines, wherein part of the sensing conductor segments and part of the connection segments are electrically connected together to form a plurality of sensing conductor blocks.

CROSS REFERENCE TO RELATED APPLICATION

This application is a divisional application of U.S. patent applicationSer. No. 14/452,981, filed on Aug. 6, 2014, which claims the benefits ofthe Taiwan Patent Application Serial Number 102214789, filed on Aug. 7,2013, the subject matter of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a display screen structure with a touchpanel and, more particularly, to an in-cell touch display structure.

2. Description of Related Art

Modern consumer electronic apparatuses are typically equipped with touchpanels for use as their input devices. According to different sensingmanners, the touch panels can be classified into resistive type,capacitive type, acoustic type, and optical type.

The conventional touch display panel includes a touch panel and adisplay unit overlapped with the touch panel. The touch panel isconfigured as an operation interface. The touch panel is transparent sothat an image generated by the display unit can be viewed directly by auser without being sheltered by the touch panel. Such well known skillof the touch panel may increase additional weight and thickness of thetouch display panel, and may further reduce the light penetration rate,and increase reflectance and haze of the touch display panel.

On-cell and in-cell touch technology were invented to overcome thedrawbacks of traditional touch technology described above. The on-celltechnology is to dispose a sensor on the back side of a color filtersubstrate to form a completed color filter substrate. One of the on-celltouch technologies is provided to dispose a touch sensor on a thin filmand then bond the thin film onto the upper one of the two substrates.

The in-cell technology is to dispose the sensor within the LCD cellstructure. Currently, there are resistive, capacitive and optical threeprimary in-cell touch technologies, wherein the resistive touchtechnology employs two conductive substrates and the voltage variationof a common layer between the two substrates for determining a touchposition on the touch display panel.

The in-cell touch technology is provided to integrate the touch sensorwithin the display unit so that the display unit is provided with theability of the touch panel. Therefore, the touch display panel does notneed to be bonded with an additional touch panel so as to simplify theassembly procedure. Such skill is generally developed by TFT LCDmanufactures.

There is older touch control technology known as out-cell, which istypically applied to the resistive and capacitive touch panels. Theout-cell touch technology is provided to add a touch module onto adisplay module. The touch module and the display module can bemanufactured by the two separated parties.

However, for all the in-cell, on-cell and out-cell touch technologies,they all need a sensing layer made of ITO material to be configured onan upper or lower glass substrate, which not only increases themanufacturing cost but also complicates the manufacturing process.Moreover, due to a low aperture rate, strong backlight is required,resulting in higher power consumption, which is disadvantageous indeveloping mobile devices with low power consumption. Therefore, itdesired for the aforementioned touch display panel structure to beimproved.

SUMMARY OF THE INVENTION

The object of the present invention is to provide an in-cell touchdisplay panel structure for not only significantly increasing the lightpenetration rate but also greatly saving the material cost andprocessing cost. Because there is no need to provide a sensing electrodelayer made of ITO material on the upper substrate or lower substrate ofa display panel, the manufacturing cost can be reduced and themanufacturing process can be simplified.

In one aspect of the present invention, there is provided an in-celltouch display structure, which comprises: an upper substrate; a lowersubstrate parallel to the upper substrate; a liquid crystal layerconfigured between the upper substrate and the lower substrate; a blackmatrix layer arranged on one side of the upper substrate facing theliquid crystal layer, the black matrix layer being composed of aplurality of opaque lines; and a thin film transistor and sensingelectrode layer arranged on one side of the lower substrate facing theliquid crystal layer, wherein the thin film transistor and sensingelectrode layer includes: a gate line sub-layer having a plurality ofgate lines arranged in a first direction and a plurality of connectionsegments arranged in a second direction, the plurality of connectionsegments arranged in the second direction being separated by theplurality of gate lines; and a source line sub-layer disposed at oneside of the gate line sub-layer facing the liquid crystal layer andhaving a plurality of source lines arranged in the second direction anda plurality of sensing conductor segments arranged in the firstdirection, the plurality of sensing conductor segments arranged in thefirst direction being separated by the plurality of source lines,wherein part of the sensing conductor segments and part of theconnection segments are electrically connected together to form aplurality of sensing conductor blocks arranged in the first direction.

In another aspect of the present invention, there is provided an in-celltouch display structure, which comprises: an upper substrate; a lowersubstrate parallel to the upper substrate; an OLED layer configuredbetween the upper substrate and the lower substrate; a thin filmtransistor and sensing electrode layer arranged on one side of the lowersubstrate facing the OLED layer for driving a corresponding pixeldriving circuit based on a display pixel signal and a display drivingsignal, wherein the thin film transistor and sensing electrode layerincludes: a gate line sub-layer having a plurality of gate linesarranged in a first direction and a plurality of connection segmentsarranged in a second direction, wherein the plurality of connectionsegments arranged in the second direction are separated by the pluralityof gate lines; and a source line sub-layer disposed at one side of thegate line sub-layer facing the liquid crystal layer and having aplurality of source lines arranged in the second direction and aplurality of sensing conductor segments arranged in the first direction,wherein the plurality of sensing conductor segments arranged in thefirst direction are separated by the plurality of source lines; acathode layer disposed at one side of the upper substrate facing theOLED layer, the cathode layer being formed with metal material; and ananode layer disposed at one side of the thin film transistor and sensingelectrode layer facing the OLED layer and having a plurality of anodepixel electrodes, each connected to a source/drain of a pixel drivingtransistor of the corresponding pixel driving circuit, wherein part ofthe sensing conductor segments and part of the connection segments areelectrically connected together to form a plurality of sensing conductorblocks arranged in the first direction.

Other objects, advantages, and novel features of the invention willbecome more apparent from the following detailed description when takenin conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates an in-cell touch display structure inaccordance with one embodiment of the present invention;

FIG. 2 shows the black matrix layer of the in-cell touch displaystructure in accordance with the present invention;

FIG. 3 schematically illustrates the gate line sub-layer of the in-celltouch display structure in accordance with the present invention;

FIG. 4 schematically illustrates the source line sub-layer of thein-cell touch display structure in accordance with the presentinvention;

FIG. 5 schematically illustrates the electrical connection between theplurality of sensing conductor segments and the plurality of connectionsegments in accordance with the present invention;

FIG. 6 schematically illustrates the electrical connection between thegate line sub-layer and the source line sub-layer in accordance with thepresent invention;

FIG. 7A and FIG. 7B are two cross sectional views taking along A-A′ andB-B′ lines of FIG. 6, respectively;

FIG. 8 schematically illustrates the sensing conductor of the presentinvention;

FIG. 9 is a schematic diagram of the multiplexing unit in accordancewith the present invention;

FIG. 10 is another schematic diagram of the multiplexing unit inaccordance with the present invention; and

FIG. 11 schematically illustrates an in-cell touch display structure inaccordance with another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to FIG. 1, there is shown an in-cell touch displaystructure in accordance with one embodiment of the present invention. Asshown, the in-cell touch display structure 100 includes an uppersubstrate 110, a lower substrate 120, a liquid crystal layer 130, ablack matrix layer 140, a thin film transistor and sensing electrodelayer 150, a color filter layer 160, an over coat layer 170, a commonelectrode (Vcom) layer 180, a first polarizer layer 190, and a secondpolarizer layer 200.

The upper substrate 110 and the lower substrate 120 are preferably glasssubstrates, and are parallel to each other. The liquid crystal layer 130is disposed between the upper and lower substrates 110, 120.

The black matrix layer 140 is between the upper substrate 110 and liquidcrystal layer 130 and is disposed at one side of the upper substrate 110that faces the liquid crystal layer 130. The black matrix layer 140 iscomposed of a plurality of opaque lines.

FIG. 2 shows the black matrix layer 140, which is the same as that ofthe prior LCD panel. As shown in FIG. 2, the black matrix layer 140 iscomposed of a plurality of opaque lines 250 of insulating material thatare black and opaque. The plurality of lines 250 of black insulatingmaterial are arranged as a checkerboard pattern and the color filter isdisposed at the spaces 260 among those opaque lines 250 of blackinsulating material.

In prior LCD panel structure, the thin film transistor layer is betweenthe lower substrate and the liquid crystal layer and is disposed at onesurface of the lower substrate that faces the liquid crystal layer. Theprior thin film transistor layer is composed of thin film transistorsand transparent electrodes.

In the present invention, a plurality of sensing conductor segments anda plurality of connection segments are provided on the prior thin filmtransistor layer and part of the plurality of sensing conductor linesegments is electrically connected to part of the plurality ofconnection segments to form a plurality of sensing conductor blocksarranged in a first direction (X-axis direction), and a plurality ofsource lines are provided to form a plurality of sensing conductor linesarranged in a second direction (Y-axis direction), thereby forming thethin film transistor and sensing electrode layer 150 in accordance withthe present invention. Therefore, there is no need to arrange a sensingelectrode layer on the upper glass substrate or the lower glasssubstrate of an LCD display panel, so as to reduce the manufacturingcost, simplify the manufacturing process and increase the yield rate.The thin film transistor and sensing electrode layer 150 is between thelower substrate 120 and the liquid crystal layer 130 and is disposed atone surface of the lower substrate 120 that faces the liquid crystallayer 130. Furthermore, the thin film transistor and sensing electrodelayer 150 includes a gate line sub-layer and a source line sub-layer.

FIG. 3 schematically illustrates the gate line sub-layer 310 inaccordance with the present invention. The gate line sub-layer 310 has aplurality of gate lines 320 and a plurality of connection segments 330.The plurality of gate lines 320 are arranged in the first direction(X-axis direction) and the plurality of connection segments 330 arearranged in the second direction (Y-axis direction), wherein theplurality of connection segments 330 arranged in the second directionare separated by the plurality of gate lines 320. Each of the pluralityof connection segments 330 arranged in the second direction includes twoends respectively having a first extension part 331 and a secondextension part 333 arranged in the first direction and extended towardtwo sides of the connection segment 330, in which the first direction issubstantially vertical to the second direction.

FIG. 4 schematically illustrates the source line sub-layer 410 inaccordance with the present invention. The source line sub-layer 410 isdisposed at one side of the gate line sub-layer 310 facing the liquidcrystal layer 130 and has a plurality of source lines 420 and aplurality of sensing conductor segments 430. The plurality of sourcelines 420 are arranged in the second direction (Y-axis direction) andthe plurality of sensing conductor segments 430 are arranged in thefirst direction (X-axis direction), wherein the plurality of sensingconductor segments 430 arranged in the first direction are separated bythe plurality of source lines 420. Each of the plurality of sensingconductor segments 430 arranged in the first direction includes two endsrespectively having a first extension part 431 and a second extensionpart 433 arranged in the second direction (Y-axis direction) andextended toward two sides of the sensing conductor segment 430.

The plurality of sensing conductor segments 430 and the plurality ofconnection segments 330 are disposed at positions corresponding to thepositions of the plurality of gate lines 320 and the plurality of sourcelines 420. Part of the sensing conductor segments 430 and part of theconnection segments 330 are electrically connected by overlapping andelectrically connecting the extension parts 331, 333, 431, 433selectively, so as to form a plurality of sensing conductor blocks, asshown in FIG. 5, arranged in the first direction, wherein each sensingconductor block is a mesh-like quadrangular region and the quadrangularregion is preferably of a rectangle.

FIG. 5 schematically illustrates the electrical connection between theplurality of sensing conductor segments 430 and the plurality ofconnection segments 330. The sensing conductor segments 430 and theconnection segments 330 are disposed at different layers, respectively,wherein the extension parts 331, 333, 431, 433 are partially overlappedand electrically connected through via 510, so as to form a plurality ofsensing conductor blocks 520 arranged in the first direction.

The plurality of sensing conductor segments 430 and the plurality ofconnection segments 330 are made of conductive metal material, whereinthe conductive metal material is selectively to be chromium, barium,aluminum, silver, copper, titanium, nickel, tantalum, cobalt, tungsten,magnesium, calcium, potassium, lithium, indium, or a mixture of LiF,MgF2 or Li2O.

FIG. 6 schematically illustrates the electrical connection between thegate line sub-layer 310 and the source line sub-layer 410, which isviewed from the upper substrate 110 to the lower substrate 120. It isnoted that, the ellipse C is employed to label the connection segments330 arranged in the second direction, which are actually not visible inthe direction from the upper substrate 110 to the lower substrate 120.

As shown in FIG. 6, the line width of the sensing conductor segment 430arranged in the first direction is equal to the line width of the gateline 320, and the line width of the connection segment 330 arranged inthe second direction is equal to the line width of the source line 420.In a typical LCD display or the present display structure, the pluralityof opaque lines 250 of the black matrix layer 140 are disposed atpositions corresponding to the positions of the plurality of gate lines320 and the plurality of source lines 420, so that the plurality ofopaque lines 250 of the black matrix layer 140 can shield the pluralityof gate lines 320 and the plurality of source lines 420. In otherembodiments, the line width of the sensing conductor segment 430arranged in the first direction can be smaller than the line width ofthe gate line 320, and the line width of the plurality of connectionsegment 330 arranged in the second direction can be smaller than theline width of the source line 420.

In the present invention, the plurality of connection segments 330arranged in the second direction are disposed at positions same as thepositions of the source lines 420 but on different layers. Similarly,the plurality of sensing conductor segments 430 arranged in the firstdirection are disposed at positions same as the positions of the gatelines 320 but on different layers. In the prior art, the gate lines andthe source lines are disposed below the opaque lines. In the presentinvention, the plurality of connection segments 330 arranged in thesecond direction and the plurality of sensing conductor segments 430arranged in the first direction are disposed at positions correspondingto the positions of the plurality of gate lines 320 and the plurality ofsource lines 420. That is, the plurality of opaque lines 250 of theblack matrix layer 140 are disposed at positions corresponding to thepositions of the plurality of gate lines 320 and the plurality of sourcelines 420. Therefore, the plurality of connection segments 330 arrangedin the second direction and the plurality of sensing conductor segments430 arranged in the first direction are also shielded by the pluralityof opaque lines 250.

FIG. 7A and FIG. 7B are two cross sectional views taking along A-A′ andB-B′ lines of FIG. 6, respectively. As shown in FIG. 7A, there is aninsulation layer 710 arranged between the gate line 320 and the secondextension part 433 arranged in the second direction. The secondextension part 433 arranged in the second direction is electricallyconnected to the first extension part 331 arranged in the firstdirection and the second extension part 333 arranged in the firstdirection through vias 510. There is an insulation layer 710 arrangedbetween the gate line 320 and the source line 420.

From FIGS. 3, 4, 5, 6, 7A and 7B, it is known that the plurality ofsensing conductor segments arranged in the first direction and theplurality of connection segments arranged in the second direction canform the plurality of sensing conductor blocks 520 arranged in the firstdirection. Further, with the plurality of source lines 420 used as aplurality of sensing conductor lines arranged in the second direction,it is able to form a touch pattern with the sensing conductor blocksarranged in the first direction and the sensing conductor lines arrangedin the second direction, so as to detect finger's touch.

FIG. 8 schematically illustrates the sensing conductor of the presentinvention, which includes a plurality of sensing conductor blocks 520arranged in the first direction and a plurality of source lines 420arranged in the second direction. The plurality of source lines 420-1,420-2, . . . , 420-M arranged in the second direction are extended toone edge 101 of the in-cell touch display structure 100 through thewires 60-1, 60-2, . . . , 60-M, and further connected to the controlcircuit 610 of a flexible circuit board 600. The plurality of sensingconductor blocks 520-1, 520-2, . . . , 520-N arranged in the firstdirection are extended to the edge 101 of the in-cell touch displaystructure 100 through the wires 70-1, 70-2, . . . , 70-N, and furtherconnected to the control device 610 of the flexible circuit board 600.

Because the plurality of sensing conductor segments 430 and theplurality of connection segments 330 are disposed at positionscorresponding to the positions of the gate lines 320 and source lines420, the sensing conductor blocks 520-1, 520-2, . . . , 520-N formedthereby are disposed at positions corresponding to the gate lines 320and the source lines 420, and thus can be shielded by the plurality ofopaque lines 250. As a result, the light penetration rate is notinfluenced.

Each of the sensing conductor blocks 520-1, 520-2, . . . , 520-N isformed with a mesh-like quadrangular region, wherein the slender metalsensing lines in each quadrangular region are electrically connectedwith each other while any two quadrangular regions are not connectedwith each other.

The control device 610 is connected to the plurality of gate lines 320,the plurality of source lines 420, and the plurality of sensingconductor blocks 520 arranged in the first direction. In sensing, thecontrol device 610 provides touch driving signals for detecting whetherthere is an external object approached through the plurality of sourcelines 420 and the sensing conductor blocks 520 arranged in the firstdirection. In displaying, the control device 610 provides display pixelsignals and display driving signals for driving corresponding pixeltransistors and pixel capacitors through the plurality of gate lines 320and the plurality of source lines 420, so as to perform a displayoperation.

Because the present invention makes use of the plurality of source lines420 to form the plurality of sensing conductor lines arranged in thesecond direction, and the source lines are also used for providing pixeldata in displaying, a multiplexing scheme is required. That is, insensing, the plurality of source lines 420 are the sensing conductorlines arranged in the second direction, and the plurality of sourcelines 420 and the sensing conductor blocks 520 arranged in the firstdirection are provided to detect whether there is an external objectapproached or touched based on a touch driving signal. In displaying,the plurality of gate lines 320 and the plurality of source lines 420are provided to drive corresponding pixel transistors and pixelcapacitors based on a display pixel signal and a display driving signal,thereby performing a display operation.

The control device 610 has a multiplexing unit 611 for providing thetouch driving signals to the plurality of source lines 420 in sensing,and providing the display pixel signals to the plurality of source lines420 in displaying. FIG. 9 is a schematic diagram of the multiplexingunit 611 in accordance with the present invention. In displaying, theswitches are switched to positions D (D-1, D-2, . . . , D-M) forproviding the display pixel signal to the plurality of source lines 420through the wires 60-1, 60-2, . . . , 60-M. In sensing, the switches areswitched to positions T (T-1, T-2, . . . , T-M) for providing the touchdriving signal to the plurality of source lines 420 through the wires60-1, 60-2, . . . , 60-M.

FIG. 10 is another schematic diagram of the multiplexing unit 611 inaccordance with the present invention, which is similar to FIG. 9 exceptthat, in sensing, the wires 60-1 and 60-2, the wires 60-3 and 60-4, . .. and the wires 60-(M-1) and 60-M are respectively electricallyconnected together, so that the corresponding source line 420 may obtaina sensing signal with a stronger signal strength.

The color filter layer 160 is arranged on one side of the black matrixlayer 140 that faces the liquid crystal layer 130. The common electrodelayer 180 is disposed between the upper substrate 110 and the lowersubstrate 120. The first polarizer layer 190 is arranged on one side theupper substrate 110 opposite to the other side of the upper substrate110 facing the liquid crystal layer 130. The second polarizer layer 200is arranged on one side of the lower substrate 120 opposite to the otherside of the lower substrate 120 facing the liquid crystal layer 130.

FIG. 11 schematically illustrates an in-cell touch display structure inaccordance with another embodiment of the present invention. As shown,the in-cell touch display structure 1100 includes an upper substrate1110, a lower substrate 1120, an organic light emitting diode (OLED)layer 1140, a thin film transistor and sensing electrode layer 1150, acathode layer 1160, an anode layer 1170, and an insulation layer 1180.

The upper substrate 1110 and the lower substrate 1120 are preferablyglass substrates and are parallel to each other. The OLED layer 1140 isdisposed between the upper and lower substrates 1110, 1120.

In this embodiment, a plurality of sensing conductor segments 430 and aplurality of connection segments 330 are provided on the prior thin filmtransistor layer and part of the plurality of sensing conductor linesegments 430 is electrically connected to part of the plurality ofconnection segments 330 to form a plurality of sensing conductor blocks520 arranged in a first direction (X-axis direction), and a plurality ofsource lines 420 are provided to form a plurality of sensing conductorlines arranged in a second direction (Y-axis direction), thereby formingthe thin film transistor and sensing electrode layer 1150 in accordancewith the present invention. Therefore, there is no need to arrange asensing electrode layer made of transparent material on the upper glasssubstrate or the lower glass substrate of a display panel, so as toreduce the manufacturing cost, simplify the manufacturing process andincrease the yield rate.

The details for the plurality of sensing conductor segments 430 and theplurality of connection segments 330 can be found in the disclosure ofthe first embodiment and FIGS. 3-10, and thus a detailed descriptiontherefor is deemed unnecessary.

The OLED layer 1140 includes a hole transporting layer 1141, an emittinglayer 1143, and an electron transporting layer 1145.

The thin film transistor and sensing electrode layer 1150 is disposed onone side of the lower substrate 1120 that faces the OLED layer 1140. Thethin film transistor and sensing electrode layer 1150 includes aplurality of gate lines (not shown), a plurality of source lines (notshown), a plurality sensing conductor blocks (not shown), and aplurality of pixel driving circuits 1151, each corresponding to a pixel,so as to drive a corresponding pixel driving circuit 1151 based on adisplay pixel signal and a display driving signal thereby performing adisplay operation.

According to different designs of the pixel driving circuit 1151, suchas 2T1C being a pixel driving circuit formed with two thin filmtransistors and a storage capacitor, and 6T2C being a pixel drivingcircuit formed with six thin film transistors and two storagecapacitors, the gate of at least one thin film transistor in the pixeldriving circuit 1151 is connected to a gate line (not shown). Accordingto different designs of driving circuit, a source/drain of at least onethin film transistor in a control circuit is connected to a source line(not shown) and a source/drain of at least one thin film transistor inpixel driving circuit 1151 is connected to a corresponding anode pixelelectrode 1171 of the anode layer 1170.

The anode layer 1170 is disposed at one side of the thin film transistorand sensing electrode layer 1150 facing the OLED layer 1140. The anodelayer 1170 includes a plurality of anode pixel electrodes 1171. Each ofthe anode pixel electrodes 1171 is corresponding to one pixel drivingtransistor of the pixel driving circuit 1151 of the thin film transistorand sensing electrode layer 1150. That is, each of the anode pixelelectrodes 1171 is connected to a source/drain of the pixel drivingtransistor of the corresponding pixel driving circuit 1151, so as toform a pixel electrode of a specific color, for example a red pixelelectrode, a green pixel electrode, or a blue pixel electrode.

The cathode layer 1160 is disposed at one side of the upper substrate1110 facing the OLED layer 1140 and between the upper substrate 1110 andthe OLED layer 1140. The cathode layer 1160 is formed with metalmaterial, preferably metal material with thickness being less than 50 nmThe metal material is selectively to be alloy of aluminum, silver,magnesium, calcium, potassium, lithium, indium, or combination oflithium fluoride, magnesium fluoride, lithium oxide and aluminum. Due tothe thickness of the cathode layer 1160 being less than 50 nm, the lightgenerated by the OLED layer 1140 can pass through the cathode layer1160, so as to show images on the upper substrate 1110. The cathodelayer 1160 is intact piece electrical connection, so that it can be usedas a shielding. Moreover, the cathode layer 1160 also receives thecurrent coining from the anode pixel electrode 1171.

In the prior art, the electrode pads made of ITO have an average lightpenetration rate of about 90%. In the present invention, the pluralityof sensing conductor blocks 520 arranged in the first direction aredisposed at positions corresponding to the positions of the gate lines320 and the source lines 420, so that the light penetration rate is notinfluenced. Therefore, the light penetration rate of the presentinvention is much better than that of the prior art. Accordingly, incomparison with the prior touch display panel, the in-cell touch displaystructure in accordance with the present invention shall have a higherbrightness.

In view of the forgoing, it is known that the present invention is ableto form a sensing touch pattern structure arranged in first and seconddirections on the thin film transistor and sensing electrode layer 150,so that there is no need to manufacture a sensing electrode layer madeof ITO material on the upper glass substrate or lower glass substrate ofthe display panel thereby reducing the manufacturing cost and decreasingthe manufacturing process.

Moreover, the plurality of connection segments 330 of the presentinvention can also be defined on the mask for defining the prior gatelines 320, and the plurality of sensing conductor segments 430 of thepresent invention can also be defined on the mask for defining the priorsource lines 420. Therefore, there is no extra manufacturing processrequired; i.e., the display panel is provided with touch controlfunction without introducing new process.

Although the present invention has been explained in relation to itspreferred embodiment, it is to be understood that many other possiblemodifications and variations can be made without departing from thespirit and scope of the invention as hereinafter claimed.

What is claimed is:
 1. An in-cell touch display structure, comprising:an upper substrate; a lower substrate parallel to the upper substrate;an OLED layer configured between the upper substrate and the lowersubstrate; a thin film transistor and sensing electrode layer arrangedon one side of the lower substrate facing the OLED layer for driving acorresponding pixel driving circuit based on a display pixel signal anda display driving signal, wherein the thin film transistor and sensingelectrode layer includes: a gate line sub-layer having a plurality ofgate lines arranged in a first direction and a plurality of connectionsegments arranged in a second direction, wherein the plurality ofconnection segments arranged in the second direction are separated bythe plurality of gate lines; and a source line sub-layer disposed at oneside of the gate line sub-layer facing the liquid crystal layer andhaving a plurality of source lines arranged in the second direction anda plurality of sensing conductor segments arranged in the firstdirection, wherein the plurality of sensing conductor segments arrangedin the first direction are separated by the plurality of source lines; acathode layer disposed at one side of the upper substrate facing theOLED layer, the cathode layer being formed with metal material; and ananode layer disposed at one side of the thin film transistor and sensingelectrode layer facing the OLED layer and having a plurality of anodepixel electrodes, each connected to a source/drain of a pixel drivingtransistor of the corresponding pixel driving circuit, wherein part ofthe sensing conductor segments and part of the connection segments areelectrically connected together to form a plurality of sensing conductorblocks arranged in the first direction, wherein the plurality of sensingconductor segments and the plurality of connection segments are disposedat positions corresponding to those of the plurality of gate lines andthe plurality of source lines, wherein each of the plurality ofconnection segments arranged in the second direction includes two endsrespectively having a first extension part and a second extension partarranged in the first direction, and each of the plurality of sensingconductor segments arranged in the first direction includes two endsrespectively having a first extension part and a second extension partarranged in the second direction, the extension parts being partiallyoverlapped.
 2. The in-cell touch display structure as claimed in claim1, wherein, in sensing, the plurality of source lines are the sensingconductor lines arranged in the second direction, and the plurality ofsource lines and the sensing conductor blocks arranged in the firstdirection are provided to detect whether there is an external objectapproached or touched based on a touch driving signal and, indisplaying, the plurality of gate lines and the plurality of sourcelines are provided to drive corresponding anode pixel electrodes basedon the display pixel signal and display driving signal, therebyperforming a display operation.
 3. The in-cell touch display structureas claimed in claim 2, wherein the plurality of sensing conductorsegments and the plurality of connection segments are made of conductivemetal material, and the first direction is vertical to the seconddirection.
 4. The in-cell touch display structure as claimed in claim 3,wherein the metal material is selectively to be aluminum, silver,magnesium, calcium, potassium, lithium, indium, or a mixture of lithiumfluoride, magnesium fluoride, lithium oxide and aluminum.
 5. The in-celltouch display structure as claimed in claim 4, wherein each of thesensing conductor blocks arranged in the first direction is a mesh-likequadrangular region, and the quadrangular region is of a rectangle. 6.The in-cell touch display structure as claimed in claim 5, wherein theplurality of sensing conductor segments arranged in the first directionand the plurality of connection segments arranged in the seconddirection are provided to form the plurality of sensing conductor blocksarranged in the first direction by electrically connecting the extensionparts partially overlapped.
 7. The in-cell touch display structure asclaimed in claim 6, wherein the OLED layer includes a hole transportinglayer, an emitting layer, and an electron transporting layer.